Analytical evaluation of jet noise source location technique utilizing an acoustically hard baffle with aperture
[electronic resource] /
by Thomas D. Norum and Edward P. McDaid.
Description
- Language(s)
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English
- Published
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Washington, D.C. : National Aeronautics and Space Administration ; 1973.
- Summary
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An analytical investigation was conducted on the experimental technique that uses shielding by an acoustically hard baffle to determine the location of noise sources in a jet. The jet exhausts through a circular hole in the baffle and the radiated acoustic power is considered to be generated by a distributed source along the jet axis. It is found that the effect of the baffle on the radiated power can be neglected only when the size of the source is on the order of a wavelength of the emitted sound or larger. Since noise sources in a jet are compact, the experimental technique is insufficient to identify these sources.
- Note
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Prepared at Langley Research Center.
Cover title.
- Physical Description
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22 p. :
ill. ;
27 cm.
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University of Illinois at Urbana-Champaign
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